changelog update

Author: stax76

docs/changelog.md

@@ -5,7 +5,8 @@
   French translation added! Thanks to the translation team!
 - Support of relative folders from command line.
 - A issue with the support of the mpv property `title-bar` has been fixed,
-  at the moment this is most useful for users of the popular uosc user script.
+  at the moment this is most useful for users of the popular uosc user script,
+  the mpv built-in OSC doesn't fully support it yet.
 
 # v7.1.1.1 Beta (2024-07-20)